Enda epv141 programmable ac dc voltmeter panel mount enda epv241 r 230 a panel mounting programmable digital voltmeter that can measure ac dc and true rms voltages indication is by a 3 digit led display and there is a front panel keypad for control a multifunctional alarm relay output that can be used to indicate upper and lower limits enda epv241 r 230 sw programmable led voltmeter